Home > Publications database > $^{\alpha}$-Zählung von Plutonium-Isotopen mit Flüssig-Szintillatoren : Vermeidung von Fehlern, die von einer Wandadsorption des Plutoniums herrühren |
Book/Report | FZJ-2017-02352 |
; ;
1963
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/14005
Report No.: Juel-0127-PC
Abstract: Tri-n-octylphosphineoxide (TOPO) has been found to be a suitabl non-quenching complexing agent for application to internal liquid scintillation of Pu eliminating the errors due to chemical wall-adsorption of hydrolized species of Pu-ions. The excellent light yield and transmission properties of the (Dioxan + PPO + POPOP + Naphtalene + TOPO) liquid scintillator allow the use of conventional counting equipment as normally used with ZnS and NaJ scintillation crystals. With such equipment counting plateaus with a slope of less than 0.1 % per 100 V over the best range are readily obtained. With low noise equipment excellent precision for absolute alpha-counting can be achieved. The scintillator mixes with samples of aqueous Pu-solutions containing considerable quantities of salts and with samples of organic Pu-solutions containing organic complexing agents of low volatility. Both these types of samples cause difficulti for counting plate techniques due to self-absorption. The liqui scintillation method described is therefore especially favourable in the analytical evaluation of solvent extraction experiments.
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